I saw a documentary once on German television that covered the transfer of a tunnel boring machine from the manufacturer somewhere in Southern Germany to the building site in the Swiss alps. They also covered the preparation (planning the route, talking to all relevant authorities, taking down traffic lights, removing parked cars, changing bus or train time tables, etc.) and the aftermath (covering the damages to the corners of buildings, replacing flower beds, etc.) All of that in a densely populated area... Amazing!